Achievable Throughput-Based Admission Control for Mobile Ad Hoc Network: Cross Layer Approach

Abstract

In recent years, MANETs have received a significant amount of attention due to the growing number of wireless device users. This has resulted in increasing the need to support real-time applications. The real-time applications require QoS assurances in terms of throughput. The major issue that is faced while providing QoS in MANET is the communication over a shared medium in a single channel. In this paper, we propose an Achievable Throughput-based Admission Control Protocol (ATACP) for preventing a channel from becoming overloaded, thereby ensuring guaranteed throughput for the real time traffic. ATACP works in a cross-layer architecture that encompasses the network and the MAC layers. The admission control is carried in each node during the route discovery. The node broadcasts the route request to its neighbors only if its achievable throughput satisfies the required throughput with considering the contention count. The achievable throughput is estimated based on the minimum idle fraction within the carrier sense range, taking into account the packet size of the new flow and the error and collision probabilities. Through extensive simulations in NS2, we show that our proposed scheme outperforms the existing ones in terms of throughput, end-to-end delay and overall performance.